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Re: cutworms on hostas?

  • Subject: Re: cutworms on hostas?
  • From: Parwinder Grewal <grewal.4@osu.edu>
  • Date: Tue, 18 Jun 2002 07:36:51 -0400

Hi Lu-Dan,

There is no information on the use of nematodes for carpenter bee control.  I do not think that they will work.  Sorry,

Parwinder Grewal

At 11:53 AM 06/17/2002 -0400, you wrote:
Hi Lu-Dan,
I tried nematodes to no avail. The only thing (unfortunately) that seems to work is to apply nasty systemic insecticides when the first notches are noticed. Here the damage is on epimedium (fresh young leaves), H. 'Honeybells'  and H. plantaginea, and anything with a bright green spring color, like the young leaves of the redbud tree (Cercis canadensis). They seem to leave dark green alone. I only spot treat because the nonsocial, solitary leaf cutter bees are realy good bees. The damage occurs only during a certain period in early spring, here in late April and into mid-May, when the bees are lining their new nests with the leaf cutouts. Apparently, the systemic gets carried into the nests and works there. More in my book page 374.
W. George
----- Original Message -----
From: Dan & Lu
To: hosta-open@hort.net
Sent: Monday, June 17, 2002 10:09 AM
Subject: Re: cutworms on hostas?

Hello Dr. Grewal,
Do these nematodes work on carpenter bees also? Would the adult bee take the nematodes into the wood and infect the bee larva also? I have carpenter bees rather badly here in Georgia.
Dan & Lu

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